Display Data Channel
- VESA Standard
- DDC version 1
- DDC1 protocol
- DDC2B protocol
- DDC2Ab protocol
- EDID 1.0
- DDC version 2
- DDC2B+ protocol
- It splits EDID into a separate standard and introduced the DDC2B+ protocol.
- DDC version 3
- DDC2Bi protocol
- It introduces the DDC2Bi protocol and support for VESA Plug and Display and Flat Panel Display Interface on separate device addresses, requiring them to comply with EDID 2.0.
- Physical link
- Pin 12
- a data line that continuoulsy transmits the 128-byte EDID block, and the data clock is syncronised with vertical sync
- DDC CI(Command Interface)/MCCS(Monitor Control Command Set)
- over a a bidirectional link such as DDC2Ab/Bi/B+
- a means for a computer to send commands to the monitor, as well as receive sensor data from the monitor
- DDC/CI is a protocol designed by VESA to configure monitor by software, using two wires on the VGA or DVI cables, which forms an I2C bus.
- DDCcontrol Documentation 0.4
page revision: 39, last edited: 17 Feb 2016 07:05